# CVE-2023-3865: linux: In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix out-of-bound read in smb2_write  ksmb...

CVE-2023-3865 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-3865, released August 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-3865
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0065
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix out-of-bound read in smb2_write  ksmbd_smb2_check_message doesn't validate hdr->NextCommand. If ->NextCommand is bigger than Offset + Length of smb2 write, It will allow oversized smb2 write length. It will cause OOB read in smb2_write.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-3865](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3865.md) | Aug 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.3.11-1 | [DEBIAN-CVE-2023-3865](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3865.md) | Aug 16, 2025 |
| Linux | linux Debian 14 | 6.3.11-1 | [DEBIAN-CVE-2023-3865](https://patchblox.com/security/data/fix/linux/debian-cve-2023-3865.md) | Aug 16, 2025 |

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